The off-stoichiometric composition and disordered alloy system is best managed using multiple scattering Green's function and
Coherent Potential Approximation (CPA) respectively. The electronic and magnetic calculations in this study are performed using
SPRKKR code[1]}, [2]}. The Perdew, Burke and Ernzerhoff(PBE) generalized gradient approximation (PBE-GGA) is used
for exchange-correlational functional[3]}. We performed first Brillouin zone integrations on the 2500 grid of
\(k\) -points and the energy convergence criteria had been set to \(10^{-5}Ry\) . The full potential spin polarised scalar relativistic
calculations with angular momentum cut-off \(l_{max}=2\)  has been performed.
